Oh, boy... where to start, LOL.
Had severe asthma when I was younger, grew out of that years ago, though.
I wouldn't say I'm arachnophobic to any degree, but yeah, I don't really like spiders either. They just bother me.
I am somewhat prone to Transient Global Amnesia (it's a stress-induced form of memory loss), however it doesn't affect me so much anymore as I've taken great measures in changing my inherently high-strung nature.
I'm more at ease with myself now, more laid back/relaxed, just take things one step at a time as opposed to always looking at the big picture and stressing myself out by overthinking things.
Aside from that, I have:
A permanent shin splint in my left leg, which only acts up if I put too much strain on it (ie. walk around a lot over a few days' time). It sometimes also acts up on bad weather days, almost like arthritis. Got a nice dark oak serpent-head cane down in Cuba for $15.00 USD about five years ago, as I decided if I ever have to hobble around with a cane, I might as well do it in style, LOL;
Two bum kneecaps, which got horribly smashed in an accident on a school trip over a decade ago. Like the shin splint, on bad weather days they can act up sometimes;
Rotator cup tendonitis in my right shoulder, which developed on the job one night at a convenience store I worked at years ago (it was the repetitive motion of sweeping/mopping that caused it, apparently);
A dislocated lower jaw, which I sustained many years ago when playing tackle football. A guy on the opposite team swung his elbow up into my face, and now I can drop it out of the joint at will. Made for a really kewl and disgusting party trick back then, but I haven't done it in a long time as it was sometimes difficult to get my jaw back into place, and it does hurt when I do it;
A dislocated right pinky finger, which I got back in high school by punching a locker door. As soon as I did it, I regretted it, LOL. But, on the upside, it's better I did that than punch the person standing in front of me;
Hypoglycemic, borderline diabetic. I manage to monitor it pretty well, so I don't need to worry about giving myself insulin shots (I hate needles, so I wouldn't be able to anyway). It doesn't really run in my family, but I got it anyway;
And, uh... nope, I think that just about does it.